These COMP Cams Ultra Gold aluminum break-in rockers are designed with a lower-than-stock ratio to help break in new Chevrolet V8 big block applications. They are engineered to eliminate excess open spring pressure, making them a must-have for the break-in process. If you have a new big block to break in, no other cams will help you do the job better than these COMP Cams Ultra Gold aluminum break-in rockers.

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